Creating notifications in Laravel - Practice Exercises

Challenge - 5 Problems

❓ component_behavior

intermediate

What is the output of this Laravel notification code?

Consider this Laravel notification class that sends a mail notification. What will be the subject of the email sent?

Laravel

namespace App\Notifications;

use Illuminate\Notifications\Notification;
use Illuminate\Notifications\Messages\MailMessage;

class WelcomeUser extends Notification
{
    public function via($notifiable)
    {
        return ['mail'];
    }

    public function toMail($notifiable)
    {
        return (new MailMessage)
            ->subject('Welcome to Our App')
            ->line('Thank you for joining us!');
    }
}

A The email subject will be 'Thank you for joining us!'.

B The email subject will be 'Welcome to Our App'.

C The email will have no subject.

D The email subject will be the user's name.

💡 Hint

Look at the subject() method inside the toMail() function.

The subject() method sets the email subject. Here it is set to 'Welcome to Our App'. The line() method adds the email body content.

❓ state_output

intermediate

What is the value of $channels after calling via()?

Given this notification class, what will be the value of $channels when calling via($user)?

Laravel

namespace App\Notifications;

use Illuminate\Notifications\Notification;

class AlertUser extends Notification
{
    public function via($notifiable)
    {
        if ($notifiable->prefers_sms) {
            return ['nexmo'];
        }
        return ['mail', 'database'];
    }
}

$user = (object) ['prefers_sms' => false];
$notification = new AlertUser();
$channels = $notification->via($user);

A null

B ['nexmo']

C [] (empty array)

D ['mail', 'database']

💡 Hint

Check the condition inside via() and the value of prefers_sms.

Since $user->prefers_sms is false, the else branch returns ['mail', 'database'].

📝 Syntax

advanced

Which option causes a syntax error in this Laravel notification?

Identify which notification class code snippet will cause a syntax error.

A public function toMail($notifiable) { return new MailMessage->line('Hello'); }

B public function toMail($notifiable) { return (new MailMessage())->line('Hello'); }

C public function toMail($notifiable) { return (new MailMessage)->line('Hello'); }

D public function toMail($notifiable) { return (new MailMessage)->subject('Hi')->line('Hello'); }

💡 Hint

Check how the new keyword is used with method calls.

Option A misses parentheses after new MailMessage, causing a syntax error because method calls require an object instance.

🔧 Debug

advanced

Why does this notification not send an email?

This notification class is supposed to send an email but does not. What is the cause?

Laravel

namespace App\Notifications;

use Illuminate\Notifications\Notification;
use Illuminate\Notifications\Messages\MailMessage;

class NotifyUser extends Notification
{
    public function via($notifiable)
    {
        return ['database'];
    }

    public function toMail($notifiable)
    {
        return (new MailMessage)
            ->subject('Alert')
            ->line('You have a new alert.');
    }
}

A The via() method does not include 'mail' channel.

B The toMail() method is missing a return statement.

C The MailMessage class is not imported.

D The notification class does not extend Notification.

💡 Hint

Check the channels returned by via() method.

The via() method returns only ['database'], so Laravel does not send mail notifications.

🧠 Conceptual

expert

Which option correctly describes Laravel notification broadcasting?

In Laravel, when using notification broadcasting, which statement is true?

A Broadcast notifications require the notifiable model to implement the ShouldBroadcast interface.

B Broadcast notifications are sent automatically without defining a toBroadcast method.

C Broadcast notifications require the notification class to implement ShouldBroadcast and define toBroadcast method.

D Broadcast notifications can only be sent via mail channel.

💡 Hint

Think about the interface and method needed for broadcasting notifications.

To broadcast notifications, the notification class must implement ShouldBroadcast and define toBroadcast method to specify broadcast data.